Outer Limits 4x4 Board

I thought I would share with the group my experience with the ACSD (Assisted Cold Start Device) on my 80s cruiser 1HDT.

The cold starting leaver on the fuel pump had a very loud clicking/rattle when the engine was cold. Pulling my hand on the leaver or moving it manually stopped the noise. After 5 mins of engine operation it would quiet down by itself.

After a few calls and I got onto Diesel Australia at Slacks Creek who immediately confirmed the problem and recommended removal of the device and replace it with a blanking plate. Failure to fix the problem can result in broken pieces being ingested by the fuel pump. So for about $20 I had all the parts posted.



I didn’t get any pics of the job in progress but it was all done within about 40 mins. I should note that you need a good quality 5mm allen key for the job. I twisted 2 keys before I borrowed a quality one from a mate.

I removed the idle up actuator (3 bolts) and then removed the ACSD (2 bolts). I used some pipe on the allen key to get some leverage. At this point you’ll loose a little diesel from the opening to the pump. Bolt the blanking plate and o-ring onto the pump. Replace the idle up actuator. You also need to reroute the water hoses using the new hose supplied. A few pumps on the fuel primer and started up.

No rattles, thats Tops!!!

Finished job:


The ACSD removed:

How does the ACSD work? Does it overfuel while cold?

Hi Joel,
Thats my understanding, I think its only required in sub 0 temperatures. Perhaps another member can clarify?
Regards, Bucko.

Gday Bucko
Thanks for the piccies. I am loosing fuel from there on mine at the moment. I may go thesame way....have you noticed any change in performance?
Andrew

Hey Andrew,
No change in performance (that I've noticed). No problems with cold starting either.
Cheers

bucko wrote:Hi Joel,
Thats my understanding, I think its only required in sub 0 temperatures. Perhaps another member can clarify?
Regards, Bucko.

Its an anti pollution device to cut the hydrocarbons from a cold engine by advancing the timing on the pump.
As the engine warms up it melts the wax in the thermowax and it goes to its warm positon.

When they rattle ,they can break off and cause expensive damage

roscoFJ73 wrote:

bucko wrote:Hi Joel,
Thats my understanding, I think its only required in sub 0 temperatures. Perhaps another member can clarify?
Regards, Bucko.

Its an anti pollution device to cut the hydrocarbons from a cold engine by advancing the timing on the pump.
As the engine warms up it melts the wax in the thermowax and it goes to its warm positon.

When they rattle ,they can break off and cause expensive damage

There you go! Thanks Rosco